Magnetic circuit structure and relay
By designing a special layout for the core, yoke, and armature components, the problem of large driving voltage dispersion caused by poor dimensional consistency at the spot welding positions of the magnetic shielding sheet was solved, thus achieving stability of relay parameters and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-10
AI Technical Summary
In actual production, the inconsistent dimensions of the spot welding positions of the magnetic shielding sheet result in large variations in the relay drive voltage and unqualified parameters.
In the magnetic circuit structure, a special layout of the iron core, yoke, and armature assembly is designed to ensure that a certain air distance is always maintained between the armature and the iron core, avoiding the use of magnetic shielding sheets and reducing driving voltage dispersion.
It effectively reduces the drive voltage dispersion of relays, ensures parameter compliance, simplifies the production process, and reduces production complexity and cost.
Smart Images
Figure CN223986541U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of relay technology, and in particular to magnetic circuit structures and relays. Background Technology
[0002] A relay is an electrical control device that causes a predetermined step change in the controlled quantity in the electrical output circuit when the input quantity changes to a specified degree. Relays can generate changes in physical quantities through electromagnetic effects, thereby controlling the circuit; a small current can control the switching on and off of a large current.
[0003] When a relay is energized, the armature is connected to the iron core. Due to the low power consumption and small ampere-turn value of the coil, this can result in a high relay drive voltage. Related technologies address this by spot-welding a magnetic shielding sheet onto the iron core. This allows the armature to connect to the shielding sheet, creating an air gap between the armature and the iron core. This reduces the relay's holding force, thereby lowering the drive voltage to the required value.
[0004] However, in actual production, the poor consistency of the spot welding position of the magnetic shielding sheet can cause large variations in the relay drive voltage and unqualified parameters. Utility Model Content
[0005] Therefore, it is necessary to provide a magnetic circuit structure and relay to solve the problem that in actual production, the poor consistency of the position and size of the spot welding of the magnetic shielding sheet will cause large dispersion of the relay driving voltage and unqualified parameters.
[0006] In a first aspect, embodiments of this application provide a magnetic circuit structure, including:
[0007] The iron core extends along the first direction;
[0008] The yoke includes a yoke body and two extensions. The yoke body extends along a first direction, and the two extensions are a first extension and a second extension. The first extension and the second extension are located at one end of the yoke body along the first direction, and the first extension and the second extension are spaced apart on both sides of the iron core along a second direction.
[0009] The armature assembly includes an armature frame, a first armature, and a second armature. Along a first direction, the first end of the armature frame is rotatable relative to the iron core. The first armature and the second armature are disposed at the second end of the armature frame along the first direction. The first armature is disposed between the iron core and the first extension, and the second armature is disposed between the iron core and the second extension. Both the first armature and the second armature are spaced apart from the iron core.
[0010] The magnetic circuit structure includes a first state and a second state;
[0011] In the first state, the first armature abuts against the first extension, and the second armature is spaced apart from the second extension;
[0012] In the second state, the second armature abuts against the second extension, and the first armature is spaced apart from the first extension;
[0013] The first direction intersects with the second direction.
[0014] In some embodiments, in a first state, along a second direction, the distance between the second armature and the second extension is less than the distance between the first armature and the core;
[0015] In the second state, along the second direction, the distance between the first armature and the first extension is less than the distance between the second armature and the core.
[0016] In some embodiments, the magnetic circuit structure further includes a base, and the iron core, yoke, and armature assembly are all located on the same side of the base;
[0017] Both extensions have protruding units in the direction away from the iron core, and the base has two recesses. The protruding units of the two extensions are respectively engaged with one of the recesses.
[0018] In some embodiments, the two recessed portions respectively include a first surface and a second surface disposed opposite to each other along a second direction;
[0019] The maximum distance between the two extensions along the second direction is greater than the dimension between the first surface and the second surface along the second direction.
[0020] In some embodiments, the maximum distance between the two extensions along the second direction is A, and the dimension between the first surface and the second surface along the second direction is B;
[0021] Where 0.02mm≤(AB)≤0.06mm.
[0022] In some embodiments, the extension includes a first surface and a second surface disposed opposite to each other along a second direction; a protruding unit is disposed on the first surface;
[0023] The extension also includes a recessed unit, which is located on the second surface of the extension and recessed toward the first surface.
[0024] In some embodiments, the extension extends along a third direction, and there are multiple protruding units along the third direction;
[0025] Among them, the third direction intersects with both the first and second directions.
[0026] In some embodiments, along the second direction, the protruding unit includes a third surface and a fourth surface disposed opposite to each other, the fourth surface being located on the side of the third surface away from the iron core;
[0027] The dimension of the third face along the first direction is smaller than the dimension of the fourth face along the first direction.
[0028] In some embodiments, the yoke is a one-piece molded structure.
[0029] Secondly, embodiments of this application provide a relay, including a magnetic circuit structure.
[0030] The above-described magnetic circuit structure and relay. The magnetic circuit structure includes an iron core, a yoke, and an armature assembly. The iron core extends along a first direction. The yoke includes an iron body and two extensions. The iron body extends along the first direction, and the two extensions are a first extension and a second extension, respectively. The first extension and the second extension are located at one end of the iron body along the first direction, and are spaced apart on both sides of the iron core along a second direction. The armature assembly includes an armature frame, a first armature, and a second armature. Along the first direction, the first end of the armature frame is rotatable relative to the iron core. The first armature and the second armature are located at the second end of the armature frame along the first direction. The first armature is located between the iron core and the first extension, and the second armature is located between the iron core and the second extension, with both the first armature and the second armature spaced apart from the iron core. The magnetic circuit structure includes a first state and a second state; in the first state, the first armature abuts against the first extension, and the second armature is spaced apart from the second extension; in the second state, the second armature abuts against the second extension, and the first armature is spaced apart from the first extension; wherein the first direction and the second direction intersect.
[0031] In the magnetic circuit structure of this application, both the first armature and the second armature are spaced apart from the iron core. In a first state, the first armature abuts against the first extension, and the second armature is spaced apart from the second extension. In a second state, the second armature abuts against the second extension, and the first armature is spaced apart from the first extension. Thus, regardless of whether it is the first state or the second state, by having one armature abut against the corresponding extension, it can be ensured that the other armature is spaced apart from the corresponding extension. Furthermore, by having both the first and second armatures spaced apart from the iron core, a certain air distance can be maintained between the first and second armatures and the iron core. This reduces the holding force of the relay, reduces the driving voltage dispersion of the relay, and ensures that the parameters are qualified. Attached Figure Description
[0032] Figure 1 This is a schematic diagram of the magnetic circuit structure in one embodiment of this application.
[0033] Figure 2 for Figure 1 A top view of the magnetic circuit structure.
[0034] Figure 3 This is a schematic diagram of the connection between the coil frame, the iron core, and the yoke in one embodiment of this application.
[0035] Figure 4 for Figure 1 A cross-sectional view of the magnetic circuit structure along the AA direction.
[0036] Figure 5 This is a schematic diagram of the iron core structure in one embodiment of this application.
[0037] Figure 6 This is a schematic diagram of the yoke structure in one embodiment of this application.
[0038] Figure 7 This is a schematic diagram of the base structure in one embodiment of this application.
[0039] Explanation of reference numerals in the attached figures:
[0040] 1. Magnetic circuit structure;
[0041] 11. Base; 12. Coil frame; 13. Iron core; 14. Yoke; 15. Armature assembly;
[0042] 111. Depression;
[0043] 141. Yoke body; 142. Extension; 143. First extension; 144. Second extension;
[0044] 1421. Protruding element; 1422. Recessed element;
[0045] 151. Bit frame; 152. First bit; 153. Second bit. Detailed Implementation
[0046] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.
[0047] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0048] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0049] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0050] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0051] Firstly, see Figure 1 , Figure 2 and Figure 3As shown. This application provides a magnetic circuit structure 1, including an iron core 13, a yoke 14, and an armature assembly 15. The iron core 13 extends along a first direction. The yoke 14 includes a yoke body 141 and two extensions 142. The yoke body 141 extends along the first direction, and the two extensions 142 are a first extension 143 and a second extension 144, respectively. The first extension 143 and the second extension 144 are disposed at one end of the yoke body 141 along the first direction, and the first extension 143 and the second extension 144 are spaced apart on both sides of the iron core 13 along a second direction. The armature assembly 15 includes an armature frame 151, a first armature 152, and a second armature 153. Along a first direction, the first end of the armature frame 151 is rotatable relative to the iron core 13. The first armature 152 and the second armature 153 are disposed at the second end of the armature frame 151 along the first direction. The first armature 152 is disposed between the iron core 13 and the first extension 143, and the second armature 153 is disposed between the iron core 13 and the second extension 144. Both the first armature 152 and the second armature 153 are spaced apart from the iron core 13. The magnetic circuit structure 1 includes a first state and a second state. In the first state, the first armature 152 abuts against the first extension 143, and the second armature 153 is spaced apart from the second extension 144. In the second state, the second armature 153 abuts against the second extension 144, and the first armature 152 is spaced apart from the first extension 143. The first direction intersects with the second direction.
[0052] It should be noted that dispersion typically refers to the degree of data dispersion, reflecting the range and degree of variation in the data distribution. Specifically, dispersion can be measured by range or standard deviation.
[0053] It should be further noted that the first direction in this application is... Figure 2 and Figure 4 The X direction in this application, and the second direction in this application are... Figure 2 and Figure 4 The Y direction in the middle. The magnetic circuit structure 1 in this application also includes a coil wound around the iron core 13, so that a magnetic field can be generated through the coil when energized.
[0054] In this application, the first state is the state of the magnetic circuit structure 1 after a first current is applied, and the second state is the state of the magnetic circuit structure 1 after a second current is applied. The first current and the second current have opposite electrical polarities. It should be noted that after the first current is applied and then disconnected, the magnetic circuit structure 1 remains in the first state; similarly, after the second current is applied and then disconnected, the magnetic circuit structure 1 remains in the second state. Furthermore, this application also includes a third state, which is the state of the magnetic circuit structure 1 during the process of switching from the first state to the second state, or the state during the process of switching from the second state to the first state. In the third state, the first armature 152 is spaced apart from the first extension 143, the second armature 153 is spaced apart from the second extension 144, and both the first armature 152 and the second armature 153 are spaced apart from the iron core 13.
[0055] Furthermore, in this application, the first extension 143 and the second extension 144 are spaced apart on both sides of the iron core 13 along the second direction. The first armature 152 is disposed between the iron core 13 and the first extension 143, and the second armature 153 is disposed between the iron core 13 and the second extension 144. Both the first armature 152 and the second armature 153 are spaced apart from the iron core 13. That is, regardless of whether it is the first state or the second state, the first armature 152 and the second armature 153 are spaced apart from the iron core 13. This allows the magnetic circuit structure 1 to abut against the second extension 144 after the transition from the first state to the second state, ensuring that the first armature 152 and the iron core 13 are always spaced apart. This reduces the holding force of the magnetic circuit structure 1 and, compared with the method of using a magnetic shielding sheet, also reduces the driving voltage dispersion of the magnetic circuit structure 1, ensuring that the parameters are qualified.
[0056] Similarly, after the magnetic circuit structure 1 transitions from the second state to the first state, it can be ensured that the second armature 153 and the iron core 13 are always spaced apart by the first armature 152 abutting against the first extension 143. This can also reduce the holding force of the magnetic circuit structure 1. Compared with the method of using a magnetic shielding sheet to shield the magnetic field, it can also reduce the driving voltage dispersion of the magnetic circuit structure 1 and ensure that the parameters are qualified.
[0057] Specifically, in the first state, the first armature 152 abuts against the first extension 143, and the second armature 153 is spaced apart from the second extension 144. Both the first armature 152 and the second armature 153 are also spaced apart from the iron core 13. When the magnetic circuit structure 1 switches to the second state, a second current flows through the coil, making the coil magnetic. The coil generates a magnetic field, which drives the first armature 152 and the second armature 153 to move via electromagnetic force. This allows the first armature 152 and the second armature 153 located on both sides of the iron core 13 to move synchronously in the same direction. During synchronous movement, since the first extension 143 and the second extension 144 are located on both sides of the first armature 152 and the second armature 153 respectively, the second extension 144 can abut against the second armature 153 to prevent the first armature 152 and the second armature 153 from continuing to move. This ensures that the second armature 153 abuts against the second extension 144, while the first armature 152 does not contact the iron core 13. This reduces the holding force of the magnetic circuit structure 1, ensuring that the driving voltage of the magnetic circuit structure 1 meets the requirements and that the parameters are qualified.
[0058] Similarly, in the second state, the second armature 153 abuts against the second extension 144, and the first armature 152 is spaced apart from the first extension 143. Both the first armature 152 and the second armature 153 are also spaced apart from the iron core 13. When the magnetic circuit structure 1 switches to the first state, a first current flows through the coil, making the coil magnetic. The coil generates a magnetic field that drives the first armature 152 and the second armature 153 to move via electromagnetic force. This can drive the first armature 152 and the second armature 153 located on both sides of the iron core 13 to move synchronously in the same direction. During the synchronous movement of the iron 153, since the first extension 143 and the second extension 144 are located on both sides of the first armature 152 and the second armature 153 respectively, the first extension 143 can abut against the first armature 152, preventing the first armature 152 and the second armature 153 from continuing to move. This ensures that the first armature 152 abuts against the first extension 143, while the second armature 153 does not contact the iron core 13. This reduces the holding force of the magnetic circuit structure 1, ensuring that the driving voltage of the magnetic circuit structure 1 meets the requirements and that the parameters are qualified.
[0059] It is understandable that during the process of the coil driving the first armature 152 and the second armature 153 to move by electromagnetic force, if the iron core 13 comes into contact with the first armature 152 and the second armature 153, it will result in a large driving voltage, which will prevent the driving voltage from reaching the required value. That is, this area is the area that is easily affected in the magnetic attraction structure. With the structure of this application, it can be ensured that the first armature 152 and the second armature 153 do not come into contact with the iron core 13 in both the first and second states.
[0060] Furthermore, since this application only requires the first armature 152 to abut against the first extension 143 in the first state to ensure that the first armature 152 and the second armature 153 are evenly spaced from the iron core 13, and in the second state, the second armature 153 to abut against the second extension 144 to ensure that the first armature 152 and the second armature 153 are evenly spaced from the iron core 13, it is not necessary to set up a magnetic shielding sheet to block the first armature 152, the second armature 153 and the iron core 13. On the one hand, it can reduce the number of components in the magnetic circuit structure 1, reduce the production complexity of the magnetic circuit structure 1, and thus reduce the production cost of the magnetic circuit structure 1. On the other hand, since it is not necessary to weld the magnetic shielding sheet to the iron core 13, it can avoid the difficulty in controlling the consistency of welding position dimensions and welding accuracy during the welding process, thereby ensuring that the voltage dispersion of the magnetic circuit structure 1 is not affected by objective factors such as welding, and reducing the voltage dispersion of the magnetic circuit structure 1.
[0061] In some embodiments, see Figure 4 As shown, in the first state, along the second direction, the distance between the second armature 153 and the second extension 144 is less than the distance between the first armature 152 and the core 13; in the second state, along the second direction, the distance between the first armature 152 and the first extension 143 is less than the distance between the second armature 153 and the core 13.
[0062] It is understandable that, in the second state, the coil drives the first armature 152 and the second armature 153 through magnetic force, thereby controlling the movement of the first armature 152 and the second armature 153. During this process, the first armature 152 and the second armature 153 on both sides of the iron core 13 move synchronously. In the first state, along the second direction, the distance between the second armature 153 and the second extension 144 is less than the distance between the first armature 152 and the iron core 13; in the second state, along the second direction, the distance between the first armature 152 and the first extension 143 is less than the distance between the second armature 153 and the iron core 13. That is, when the magnetic circuit structure 1 switches from the first state to the second state, when the second armature 153 moves to contact the second extension 144, the first armature 152 has not yet moved to contact the iron core 13. In other words, when the second armature 153 abuts against the second extension 144, the first armature 152 and the iron core 13 are spaced apart.
[0063] Meanwhile, as the second armature 153 moves to abut against the second extension 144, the second armature 153 moves in a direction away from the iron core 13. That is, the second armature 153 and the iron core 13 are not only spaced apart, but the distance between the second armature 153 and the iron core 13 is also increased. In this way, in the second state, it can be ensured that the first armature 152 and the second armature 153 are spaced apart from the iron core 13, thereby reducing the holding force of the magnetic circuit structure 1, reducing the driving voltage dispersion of the magnetic circuit structure 1, and ensuring that the parameters are qualified.
[0064] Similarly, when the magnetic circuit structure 1 switches from the second state to the first state, when the first armature 152 moves to contact the first extension 143, the second armature 153 has not yet moved to contact the iron core 13. That is, when the first armature 152 abuts against the first extension 143, the second armature 153 and the iron core 13 are spaced apart.
[0065] Meanwhile, as the first armature 152 moves to abut against the first extension 143, the first armature 152 moves in a direction away from the iron core 13. That is, the first armature 152 and the iron core 13 are not only spaced apart, but the distance between the first armature 152 and the iron core 13 is also increased. In this way, in the first state, it can be ensured that the first armature 152 and the second armature 153 are spaced apart from the iron core 13, thereby reducing the holding force of the magnetic circuit structure 1, reducing the driving voltage dispersion of the magnetic circuit structure 1, and ensuring that the parameters are qualified.
[0066] In some embodiments, see Figure 6 and Figure 7 As shown, the magnetic circuit structure 1 also includes a base 11, and the iron core 13, yoke 14 and armature assembly 15 are all located on the same side of the base 11; the two extensions 142 are provided with protruding units 1421 in the direction away from the iron core 13, and the base 11 is provided with two recesses 111, and the protruding units 1421 of the two extensions 142 are respectively engaged with one of the recesses 111.
[0067] The magnetic circuit structure 1 also includes a coil frame 12, which is located on one side of the base 11. An iron core 13 is mounted on the coil frame 12, and the coil is wound around the iron core 13. The base 11 serves as a support structure for the magnetic circuit structure 1, supporting and fixing other components within it. Thus, on one hand, the base 11 and the extension 142 can be fixedly connected via a snap-fit connection between the recessed portion 111 and the protruding unit 1421, improving the stability and reliability of the extension 142's connection to the base 11. On the other hand, the snap-fit connection between the extension 142 and the base 11 facilitates installation and disassembly, making it easier for operators to use.
[0068] In some embodiments, the two recesses 111 respectively include a first surface and a second surface disposed opposite to each other along a second direction; the maximum distance between the two extensions 142 along the second direction is greater than the dimension between the first surface and the second surface along the second direction.
[0069] Thus, since the maximum distance between the two extensions 142 along the second direction is greater than the dimension between the first surface and the second surface along the second direction, that is, the yoke 14 and the base 11 are in an interference fit state, the elastic deformation of the yoke 14 and the base 11 can be used to achieve a tight connection between the yoke 14 and the base 11, preventing the yoke 14 and the base 11 from separating, thereby further improving the stability and reliability of the connection between the yoke 14 and the base 11, and ensuring the consistency of the assembly of the yoke 14 and the base 11.
[0070] In some embodiments, the maximum distance between the two extensions 142 along the second direction is A, and the dimension between the first surface and the second surface along the second direction is B. Wherein, 0.02mm ≤ (AB) ≤ 0.06mm.
[0071] It should be noted that 0.02mm≤(AB)≤0.06mm means that the minimum value of (AB) is 0.02mm and the maximum value of (AB) is 0.06mm. For example, (AB) can be 0.02mm, 0.03mm, 0.045mm, 0.06mm, etc. The specific value of (AB) will not be elaborated here.
[0072] Thus, on the one hand, when the value of (AB) is large, the stability and reliability of the connection between the yoke 14 and the base 11 can be improved; on the other hand, when the value of (AB) is small, the installation and disassembly of the yoke 14 and the base 11 can be facilitated while ensuring the stability between them, and the deformation of the yoke 14 during installation or disassembly can be reduced.
[0073] In some embodiments, see Figure 6 As shown, the extension 142 includes a first surface and a second surface disposed opposite to each other along a second direction; a protruding unit 1421 is disposed on the first surface. The extension 142 also includes a recessed unit 1422, which is disposed on the second surface of the extension 142 and recessed toward the first surface.
[0074] Thus, since the extension 142 also includes a recessed unit 1422, which is located on the second surface of the extension 142 and recessed towards the first surface, the recessed unit 1422 is recessed towards the first surface during the fabrication of the extension 142 to form a protruding unit 1421. This protruding unit 1421 is formed by stamping. On one hand, this improves the production efficiency of the extension 142, enabling mass production. On the other hand, forming the protruding unit 1421 by stamping fully utilizes the material, avoiding material waste and reducing production costs. Furthermore, since the protruding unit 1421 can be formed without additional components, the overall weight of the extension 142 is reduced, thereby reducing the overall weight of the magnetic circuit structure 1.
[0075] In some embodiments, the extension 142 extends along a third direction, and there are multiple protruding units 1421 along the third direction. The third direction intersects with both the first direction and the second direction.
[0076] It should be noted that the third party is... Figure 6 The Z direction in the equation.
[0077] In this way, the tightness of the connection between the protruding unit 1421 and the base 11 can be further improved through the connection between the multiple protruding units 1421 and the base 11, thereby further improving the stability and reliability of the connection between the extension 142 and the base 11.
[0078] In some embodiments, along the second direction, the protruding unit 1421 includes a third surface and a fourth surface disposed opposite to each other, the fourth surface being located on the side of the third surface away from the iron core 13; the dimension of the third surface along the first direction is smaller than the dimension of the fourth surface along the first direction.
[0079] Thus, since the dimension of the third surface along the first direction is smaller than the dimension of the fourth surface along the first direction, that is, along the second direction, the dimension of the surface of the protruding unit 1421 facing the base 11 along the first direction is larger than the dimension of the surface of the protruding unit 1421 away from the base 11 along the first direction, that is, the protruding unit 1421 is formed into a wedge-shaped structure, thereby further improving the strength of the connection between the protruding unit 1421 and the recess 111, and further improving the connection strength and stability between the extension 142 and the base 11.
[0080] In some embodiments, the yoke 14 is a one-piece molded structure.
[0081] In this way, on the one hand, the number of parts and welding points of the yoke 14 can be reduced, thereby improving the overall strength of the yoke 14, and thus improving the overall strength and stability of the magnetic circuit structure 1; on the other hand, the production line for the parts of the yoke 14 can be reduced, thereby shortening the production cycle of the yoke 14, thereby reducing the manufacturing cost of the yoke 14, and ultimately reducing the manufacturing cost of the magnetic circuit structure 1.
[0082] Secondly, embodiments of this application provide a relay, including the magnetic circuit structure 1 of the first aspect.
[0083] A relay is an electrical control device that causes a predetermined step change in the controlled quantity in the electrical output circuit when the input quantity changes to a specified value. Relays can generate changes in physical quantities through electromagnetic effects, thereby controlling the circuit; a small current can control the switching on and off of a large current.
[0084] Thus, in the second state, the second armature 153 abuts against the second extension 144, and the first armature 152 is spaced apart from the first extension 143. In this second state, the abutment between the second armature 153 and the second extension 144 ensures that the first armature 152 and the first extension 143 are spaced apart, and both the first armature 152 and the second armature 153 are spaced apart from the iron core 13. This allows for a certain air distance between the first armature 152 and the second armature 153 and the iron core 13, reducing the holding force of the magnetic circuit structure 1, thereby reducing the holding force of the relay, reducing the relay's driving voltage dispersion, and ensuring that the parameters are qualified.
[0085] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0086] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.
Claims
1. A magnetic circuit structure, characterized by, The application relates to a magnetic circuit structure, comprising: an iron core extending along a first direction; a yoke iron comprising a yoke iron body extending along the first direction and two extension parts, i.e. a first extension part and a second extension part, which are arranged at one end of the yoke iron body along the first direction and are spaced apart along a second direction on two sides of the iron core; an armature assembly comprising an armature frame, a first armature and a second armature, the first end of the armature frame being rotatable relative to the iron core along the first direction, the first armature and the second armature being arranged at the second end of the armature frame along the first direction, the first armature being arranged between the iron core and the first extension part, the second armature being arranged between the iron core and the second extension part, and the first armature and the second armature being spaced apart from the iron core; the magnetic circuit structure comprising a first state and a second state; in the first state, the first armature abuts against the first extension part, and the second armature is spaced apart from the second extension part; in the second state, the second armature abuts against the second extension part, and the first armature is spaced apart from the first extension part; wherein the first direction intersects the second direction.
2. The magnetic circuit structure according to claim 1, characterized in that in the first state, along the second direction, the distance between the second armature and the second extension part is smaller than the distance between the first armature and the iron core; in the second state, along the second direction, the distance between the first armature and the first extension part is smaller than the distance between the second armature and the iron core.
3. The magnetic circuit structure according to claim 1, characterized in that the magnetic circuit structure further comprises a base, and the iron core, the yoke iron and the armature assembly are arranged on the same side of the base; the two extension parts are each provided with a protruding unit in a direction away from the iron core, and the base is provided with two recessed parts, and the protruding units of the two extension parts are respectively connected to one of the recessed parts in a clamping manner.
4. The magnetic circuit structure according to claim 3, characterized in that the two recessed parts each comprise a first surface and a second surface arranged opposite to each other along the second direction; the maximum distance of the two extension parts along the second direction is greater than the size between the first surface and the second surface along the second direction.
5. The magnetic circuit structure according to claim 4, characterized in that the maximum distance of the two extension parts along the second direction is A, and the size between the first surface and the second surface along the second direction is B; wherein 0.02mm<= (A-B) <= 0.06mm.
6. The magnetic circuit structure according to any one of claims 3 to 5, characterized in that the extension part comprises a first surface and a second surface arranged opposite to each other along the second direction, and the protruding unit is arranged on the first surface; the extension part further comprises a recessed unit arranged on the second surface of the extension part and recessed towards the first surface.
7. The magnetic circuit structure according to any one of claims 3 to 5, characterized in that the extension part extends along a third direction, and along the third direction, the protruding unit is a plurality of protruding units; wherein the third direction intersects the first direction and the second direction.
8. The magnetic circuit structure according to any one of claims 3 to 5, characterized in that along the second direction, the protruding unit comprises a third surface and a fourth surface arranged opposite to each other, and the fourth surface is located on the side of the third surface away from the iron core. The third face has a dimension in the first direction that is smaller than a dimension of the fourth face in the first direction.
9. The magnetic circuit structure according to any one of claims 1 to 5, characterized by, The yoke is of an integral structure.
10. A relay characterized by comprising: The magnetic circuit structure of any one of claims 1-9.